Former U.S. Federal Reserve chairman Ben Bernanke takes part in a question and answer session at an Economic Club of Canada event in Toronto on Tuesday, April 22, 2014. (AP Photo/The Canadian Press, ... more

Former U.S. Federal Reserve chairman Ben Bernanke takes part in a question and answer session at an Economic Club of Canada event in Toronto on Tuesday, April 22, 2014. (AP Photo/The Canadian Press, Michelle Siu) less